Critical severity10.0NVD Advisory· Published Nov 4, 2021· Updated Jun 17, 2026

CVE-2021-34795

Description

Multiple vulnerabilities in the web-based management interface of the Cisco Catalyst Passive Optical Network (PON) Series Switches Optical Network Terminal (ONT) could allow an unauthenticated, remote attacker to perform the following actions: Log in with a default credential if the Telnet protocol is enabled Perform command injection Modify the configuration For more information about these vulnerabilities, see the Details section of this advisory.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Cisco Systems, Inc./Catalyst Passive Optical Network (PON) Series Switches Optical Network Terminal (ONT)llm-fuzzy
Cisco Systems, Inc./Cisco Catalyst 6800 Series Switchescpe-rescue
Range: n/a

Patches

Vulnerability mechanics

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-catpon-multivulns-CE3DSYGrnvdPatchVendor Advisory

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